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Post by willieman on Oct 24, 2013 15:48:30 GMT -6
Okay...I think I read somewhere that tall injector stacks were for an automatic shift car and short for standard shift..Is this right or not !
Thanks a bunch in advance!
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Post by Snake45 on Oct 24, 2013 19:19:45 GMT -6
Okay...I think I read somewhere that tall injector stacks were for an automatic shift car and short for standard shift..Is this right or not ! Thanks a bunch in advance! I don't think I've ever heard that. I've always heard it was more of an RPM tuning thing. The shorter the stacks, the higher the RPM they were going for; the taller, they wanted to make the power farther down the scale (maybe going for engine-saving reliability). I've seen both short and long stacks on Hemis, BBCs, and BB Fords, but do you notice you just about never see long stacks on small block Chevies, only short ones (the pipes in the AMT '55 Nomad notwithstanding). |
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Post by 41chevy on Oct 25, 2013 11:25:14 GMT -6
Never heard the Automatic /Stick Stack difference. The longer the stack the lower to power band comes in. A 6 inch stack on a small block generally put the power band in between 2400 and 5500 rpm The stacks were never longer than 14 inches in the day as my fuzzy old brain recalls. Paul
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Post by mr1969edjr on Oct 26, 2013 8:13:42 GMT -6
When Ronnie Sox built the 66 Baracuda it had the stock front finders with the wheels moved forward. That car had a 4 speed and short stacks when he extended the front end it was automatic with tall stacks. I remember hearing Jake King say that the automatics ran better with tall stacks but I don't remember why. Then in 1969 Ronnie had a 69 Barracuda that was automatic with 6"stacks. Elvin
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Post by Snake45 on Oct 26, 2013 11:55:31 GMT -6
Ever notice you almost never see long stacks on open-bodied cars such as rails and Altereds? Only on full-bodied cars like gassers and AWB funnies? Wonder if the length is partially just to get the opening up above the body and into fresh air?
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Post by Deleted on Mar 22, 2014 5:43:03 GMT -6
I don't think I've posted on here before, although I recognize some of you from other forums. But I thought I might jump in on this old thread in case anyone is still wondering. Basically, long ram tubes (injector stacks) create more low end power/torque, and short tubes make more high end power/torque. Thus, you'll see the short tubes on clutch cars because they don't need the low end power - they can leave on the clutch at high rpm. Conversely, automatic cars have to leave a lower rpm (especially back in the day before high-stall convertors and such) and really need the low end grunt to get moving, so it's more common to see long injector tubes on these cars. The picture gets a little mixed up because many cars back then ran a combination of automatic and stick trans, such as ClutchFlite and ClutchTurboHydro trans, which combined an automatic trans case with a clutch....the best of both worlds, though they were somewhat prone to breakage.
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